<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function test(){
	var xmlhttp=new XMLHttpRequest();
	xmlhttp.open("post","servletA",true);
	xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
	xmlhttp.send();
	xmlhttp.onreadystatechange=function(){
		if(xmlhttp.readyState==4 && xmlhttp.status==200){
			document.getElementById("add").innerHTML+=xmlhttp.responseText;
		}
	}
}
</script>
</head>
<body>
	<input type="button" value="123" onclick="test()">
	<div id="add"></div>
</body>
</html>